Wilitelm bunge



(No Model.)

W. BUNGE.y

SIFTING MACHINE. No. 589,929. Patented Sept. 14,1897.

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SIFTINGEVIACHINE.

SPECIFICATION forming part of Letters Patent 180.589,929, dated,September 14, 1897.

Application filed March 10, 1894. Serial No. 503,206. (No m land March1, 1894, No. 4,338; in Switzerland March 1, 1 gium March 6, 1894, No.108,854; in Hungary May 30, Austria August 1l, 1894, No. 3,990.

To all whom it' may concern:

Beit known that I, XVILHELM BUNGE, of Lubeck, in the Kingdom of Prussiaand Empire of Germany, have invented Va new and useful Improvement inSitting-Machines, (for which I have obtained a patent in Germany, No.77,588, dated July 21, 1893; in Great Britain, No. 4,33S,dated March 1,1894; in Switzerland,No. 8,321, dated March 1,1894; in France,180.236,797, dated Marclr, 1894; inlelgium, No. 108,854, dated March (i,1894; in Hungary, No. 519, dated May 30, 1894; ,in Canada, No. 46,733,dated August 4, 1894, and in Austria, No. 3, 990,dated August 11,1894,)of which the following is a specification, reference being had to theaccompanying drawing, which forms a part of this specification.

The object of my invention is to provide a horizontal siftingmachinevemployin g a number of sieves which may be easily taken apart from oneanother for the purpose of cleaning or for varying the size or shape ofthe sieves or for reducing the number employed, according to the goodsto be sifted.4

A further object of my invention is to obtain a spiral sifting motion ofthe machine, such as is obtained when. sifting is done by hand, thismotion being partie ularlyefi'ective in sifting processes. I attainthese objects by the mechanism hereinafter described with reference tothe accompanying drawing and pointed out in the claim.

The said drawing is a vertical section of my machine. i

A, B, and C represent a number of sieves secured together to form ahorizontal siftingmachine. Each sieve is separate from the others and iscomposed of the outer ring o,

9 and the smaller inner rin-g a'. The rings a and a. carry thesifting-cloth, which may be of any material or mesh desired.t The ring ahasattached to it by any suitable means (not shown) a projecting ring 0,on which is loosely tted the ring 7c, of angle-iron, carrying the brushIt. By this arrangement as the machine is turned in a spiral directionthe brushes are thrown around on the ring o and in this manner clean thesifting-cloth.

To the bottom of each sieve is secured a odehl Patented in Germany Tuly21, 1893, No. 77,588; in Eng- 894, No. 8,321; `in France March 6,1894,1To. 236,797; in Bel- 1894, No. 519,' in Canada August 4,1894, No.46,733, and in circular cone-shaped plate e, provided with a centralopening and with an opening at its outer periphery to allow theparticles which pass through the cloth to fall onto the sieve below it.`.As will be seen from the drawing, the heavy particles from the iirstsieve pass through the central opening and into the chute to be conveyedaway, while the Jiner particles pass through the sieve onto theconeshaped plate beneath it, which guides them onto the next sieve. Thenext plate in turn may be provided with a chute, as e', for conveyingthe nner particles from its sieve into a chute e2, while the coarserparticles escape through the central opening of its plate onto lthe nextsieve. The cone-plate of this sieve may be provided with a chute e4 forconveying away the ner particles, while the -coarser particles escapethrough a central opening onto the next sieve. This construc- ,i tion isprovided on each of the sieves, with the exception of the iirst, whichis preferably of the form shown. After the material has passed throughthe series of sieves that portionof it remaining on the last sieveescapes through the chute e3.

At the top of the machineA and surmounting the sieves I locate acone-shaped plate c5, onwhich the material falls from the chute d. Thisplate as the machine is operated scattersthe material to its outer edge,where it passes onto the first sieve. It then passes through the severalsieves, as above described, its course being indicated by the arrows.

The several sieves are secured on each other with a suitable packingbetween them and are securely held by the clamp c, which is carried by arod mounted on the base of themachine. The base may be of any desiredconstruction and it has connected with it the means by which the deviceis suspended.

g represents a number of rods (four being used) which are connected atone end to an overhead support and at their other ends.` to the machine.This desirable movement is obtained by the following means: t'represents a short shaft rigidly secured at one end tothe machine and atits other end eccentrically to the crank h.

Thus it will be IOO seen that as the device is rotated it Will not be inahorizontal plane, but in avarying one, this being aided by reason ofthe mounting of the machine by the rods g and the eccentric connectionWith the crank.

The operation of my machine is as follows: The machine is set in motionand the material to be sifted fed to it through the chute d. It is thenguided to the outer edge of the first cone-shaped plate and then ontothe first sieve. The finer particles pass through the sieve onto thecone-shaped plate beneath it, which either conveys it to a chute or ontothe next sieve, While the coa-rser particles either escape into a chuteor onto the next sieve, as the case may be. This is kept up until thematerial has passed through the entire machine and has been separatedinto various grades.

Having thus described my invention, the following is what I claim as newtherein and desire to secure by Letters Patent:

In combination, a series of sieves, having inner rings, the flanges osecured to the outer side of said inner rings, the brushes and the rings7a forming a part of the brushsupport and loosely held on the rings o tohave lateral movement, the said brushes bearing on the under sides ofthe sieves, and means for giving the sieve a gyrating movement about aixed axis, substantially as described.

In Witness whereof I have hereunto set my hand in presence of twowitnesses.

WILHELM BUNGE.

Witnesses: v

FERD SCHREIBER, CHR. KAHL.

